am i pregnant??


I am currently 3 days late. my period should of started Sunday and today is Tuesday and I still haven't gotten it. I am never late I have a regular cycle always have. I had unprotected sex on August 8th the beginning of my ovulation week, I take a fertility vitamin every day and also used contraception plus lubricant. I'm hoping I am pregnant but I don't want to take a test yet in fear its negative. any thoughts???